Question

sam received $1120 interest from his 4 year investment at 3.5% p.a. simple interest. how much did sam invest?.

Answer 1

total is 1120
interest is 3.5
interest earn in 1 yr be p
so is p/ 100 × 3.5 ×4 = 1120
1120÷4= p/100x 3.5
280=p/100 x 3.5
280÷3.5= p/100
80=p/100
p= 8000

Answer 2

$8000 is the answer.